Set the slide switch to mod and turn the dial to 160 to start. You're up here in Maine with me so, when it gets damn cold out, if the house won't heat, turn the dial up 20 degrees until it will. You can also try going lower if the house is heating ok. The dial is what sets the temperature differential between outside temp and boiler supply temp, adjusted for degree days. I found that 160 to 180 seems to work pretty good around here.

Set the slide switch to mod and turn the dial to 160 to start. You're up here in Maine with me so, when it gets damn cold out, if the house won't heat, turn the dial up 20 degrees until it will. You can also try going lower if the house is heating ok. The dial is what sets the temperature differential between outside temp and boiler supply temp, adjusted for degree days. I found that 160 to 180 seems to work pretty good around here.

Click to expand...

Done and done, thanks so much. Hopefully we'll see some savings now that this thing is actually doing its job.